Currently the following packages are independent of each other:

• Microsoft.CodeAnalysis.CSharp.Analyzer.Testing.XUnit
• Microsoft.CodeAnalysis.CSharp.CodeFix.Testing.XUnit
• Microsoft.CodeAnalysis.VisualBasic.Analyzer.Testing.XUnit
• Microsoft.CodeAnalysis.VisualBasic.CodeFix.Testing.XUnit

We should consider making the Analyzer packages a dependency of the associated CodeFix package to reduce the number of dependencies users must declare in the project file. See microsoft/vs-threading@498f20d for an example.